It looks like Pokemon is enjoying a mini-revival on Teesside thanks the new game Pokemon GO.

For most Teessiders in their twenties, some period of time in the late 1990s will have been spent collecting Pokemon cards , pestering parents for packs - and arguing with teachers who confiscated their collection.

Kids in playgrounds across Teesside, from Eaglescliffe to Brotton, spent a large part of their time swapping, shouting and scrapping over the cards.

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Back then, the packs from the Base Set, Fossil and Jungle were available for around £3 and people opened hundreds of pounds' worth of them as they hunted for the rarest Pokemon...like Charizard.

If you couldn't bag all of the cards you wanted through opening packs, there were events at places like Chips in Stockon or you could always find people on market stalls selling cards.

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Since it has been almost 15 years since the huge popularity of Pokemon started to dwindle, you have probably ended up throwing your collection out or losing them.

But if you knew how much they were now worth, you'd seriously regret letting them out of your sight.

Base set booster box - £1,000 +

It's highly unlikely, but if you have a sealed box from the original release of Pokemon - the base set - you're seriously quids in.

If you've got a first edition box then you're well in the money - they're worth as much as £7,600!

Base set booster packs - £20-£200+

A sealed booster pack will set you back around £20-£30, but these packs for sale on eBay are usually weighted - meaning that you're more than likely getting a pack that doesn't have a holographic card in it.

However, if you've got a first edition pack, you're looking at getting as much as £300 per pack and if they're graded by PSA, then you could be looking well over £400.

Charizard - £40-several thousand

By far the rarest and most sort after card in the set.

Depending on the condition of the card, it may fetch as little as £40 or as much as £4,000... for a single card!

However, unless you've had a card like this in a top loader protective sleeve and kept it out of the way of dirty hands, you're probably not going to be able to book a holiday just yet.